Reload the lesson page. Course video is served from a signed distribution, and the authorisation your browser holds lasts six hours from the moment that lesson page loaded. Once it expires the next piece of video is refused and the player stops without putting anything on screen. Reloading issues a fresh authorisation.
Nothing has changed about your account, your membership or your enrolment.
The six hours run from the page load, not from playback
Opening a lesson authorises your browser for that lesson's video for six hours. It is not extended while you watch and it is not renewed while the page sits in a background tab. Leave a lesson open all day, come back to it, and the authorisation is gone even though the page still looks normal.
You usually notice a little after the six-hour mark, because the part of the video already loaded ahead finishes first. Then the picture freezes, or the spinner stays, and pressing play does nothing.
Opening another lesson in a second tab stops the first one
The authorisation covers one lesson's video at a time. Loading a different lesson, in any tab, replaces it, so the older tab loses playback at the next piece of video it needs. Watch one lesson at a time, and reload whichever tab you want to carry on in.
What to do
- Note where you were on the seek bar.
- Reload the page.
- Press play, then drag back to that point. A reload restores your saved position, which for an unfinished lesson is the start. Resuming a course video explains why.
If reloading does not fix it, check that you are still signed in, and that your browser is not set to block or clear cookies for uni.xyz. The authorisation travels as a cookie, so a browser that discards it cannot play course video at all. Private windows that clear cookies between sessions have the same effect.
When the video never started in the first place
This article is about a video that was playing and stopped. A lesson that has never shown a player at all is a different situation: see a course lesson with no video yet.